Marin Mersenne 2^P-1
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MnStatusDetails
2222687Factored
FactorDigitsBitsDate
1896510782374852807338018724887289088938123.82022-10-02 16:55:08
ECM
DigitsB1Curves
2550000280 / 280
3025000076 / 640
Estimated T-Level: 25.6
TF below 2^80 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Remco Blaakmeer2387B0122AB2C1950
Verified (Factored)Tyler Bennett2387B0122AB2C1950
Verified (Factored)1999-06-06Alexey Guzeev2387B0122AB2C1951738590
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-10-04LordJulius391CA6B94D6B0D3F171136553
P-1 factors
DateFactorB1B2
2022-10-0218965107823748528073380187248872890889100000000100000000
History
DateUserTypeResult
2022-10-04YeakomeisterCERT
PRP Certification
Proof certified good
2022-10-04LordJuliusC-PRP
M2222687/18965107823748528073380187248872890889 : 391CA6B94D6B0D3F
PRP proof power = 7
PRP: Verified
Proof certified good
2022-10-02LaurVF-PM1
Factor: 18965107823748528073380187248872890889 / (P-1, B1=100000000, B2=100000000)
2022-09-09LaurVNF
no factor from 2^71 to 2^72
2022-09-09LaurVNF
no factor from 2^70 to 2^71
2022-09-09LaurVNF
no factor from 2^69 to 2^70
2022-04-15LaurVNF-PM1
B1=57885161, B2=2100390512220
2022-03-18LaurVNF-PM1
B1=82589933
2022-02-19LaurVNF-PM1
B1=57885161, B2=579246627960
2022-02-06LaurVNF-PM1
B1=57885161
2022-01-27LaurVNF-PM1
B1=6972593, B2=112580788320
2022-01-25LaurVNF-PM1
B1=6972593
2021-08-19TJAOINF
no factor from 2^68 to 2^69
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2016-12-23Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-12-22Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-11-21Alexander DubrovinNF-PM1
B1=1000000, B2=5000000, E=6
2015-10-23ramgeisNF
no factor from 2^65 to 2^66
2015-05-01Squeeky_SquirrelNF-PM1
B1=160000, B2=4600000, E=6
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=142754
2014-05-26JossNF-PM1
B1=113877
2013-08-20David CampeauNF
no factor from 2^62 to 2^63
2012-04-19Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-10Oscar ÖstlinNF-PM1
B1=85000, B2=1593750, E=6
2010-10-20Oscar ÖstlinNF-PM1
B1=75011
2009-01-10Sturle SundeNF
no factor from 2^60 to 2^61